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EP0999972B1 - Servo-soupape - Google Patents

Servo-soupape Download PDF

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Publication number
EP0999972B1
EP0999972B1 EP98941402A EP98941402A EP0999972B1 EP 0999972 B1 EP0999972 B1 EP 0999972B1 EP 98941402 A EP98941402 A EP 98941402A EP 98941402 A EP98941402 A EP 98941402A EP 0999972 B1 EP0999972 B1 EP 0999972B1
Authority
EP
European Patent Office
Prior art keywords
rotary spool
sleeve
rotary
spring
axially
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98941402A
Other languages
German (de)
English (en)
Other versions
EP0999972A1 (fr
Inventor
Edwin Breuning
Bernd Schiek
Gerd Speidel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Presta Muelheim GmbH
Original Assignee
Mercedes Benz Lenkungen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mercedes Benz Lenkungen GmbH filed Critical Mercedes Benz Lenkungen GmbH
Publication of EP0999972A1 publication Critical patent/EP0999972A1/fr
Application granted granted Critical
Publication of EP0999972B1 publication Critical patent/EP0999972B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
    • B62D5/083—Rotary valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86638—Rotary valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86638—Rotary valve
    • Y10T137/86646—Plug type
    • Y10T137/86654—For plural lines

Definitions

  • the invention relates to a servo valve, in particular for Hydraulic power steering systems for motor vehicles, in the form a rotary valve with a rotary valve and one against this coaxially, relative to the rotary valve Spring force rotatable control bush.
  • Such servo valves are, for example, from DE 42 34 571 A1 as well as US 4,966,192.
  • the rotary valve and the control bush form parts of a wave train that has a steering handwheel with the steered Mechanically couples vehicle wheels.
  • the Control socket rotatably connected shaft part and a Shaft part carrying or having rotary slide valve axially fixed to each other by a torsion bar, however torsionally elastic connected.
  • This rotary stroke between the control bush and rotary valve causes a valve controlled by the servo valve hydraulic servo motor with hydraulic pressure or one hydraulic pressure difference in one way or another Direction, depending on the direction of the relative twist between Control socket and rotary valve, is controlled controllably and supports the respective steering maneuver, i.e. the one on the steering wheel hand force to be reduced accordingly.
  • the spring force is typically generated by a torsion bar, the mechanical the rotary valve with the control bush couples.
  • the rotary slide valve is used to accommodate the torsion bar as well as axially connected parts of the control bush or tubular elements connected in a rotationally fixed manner to the control bushing educated.
  • axially between one end of the control socket and one part on the rotary slide valve is a ring-like one Arrange rotary vane section comprising spring, which at Relative rotations between control bush and rotary valve due to the distance from each other in the circumferential direction Rotary vane section removing extensions more or is bent up less.
  • a particular advantage of this construction is that easy assembly of the C-spring.
  • the C-spring can also be designed with a preload, such that even if the pens are aligned predetermined spring tension is present.
  • the rotary valve and the control bushing additionally to connect via a torsion bar that within a tubular interior of the rotary valve is housed and at one end, for example through pinning, firmly with the rotary valve and firmly at its other end the control socket or non-rotatable parts.
  • This torsion bar causes in addition to the aforementioned C-spring with relative rotations between control bush and rotary valve an increasing restoring force.
  • the torsion bar is used to control and To hold the rotary valve axially relative to each other.
  • the object of the invention is now in a structurally simple Way also with a servo valve of the type specified then an axially fixed position of the rotary valve and control bush ensure relative to each other when on the arrangement a torsion bar is dispensed with.
  • Control socket with a coaxial sleeve and axially between the control bush and the sleeve a bearing is arranged or formed, which the control socket and holds the rotary valve axially fixed relative to each other.
  • the invention is based on the general idea that Rotary slide valve to integrate a bearing and its simple arrangement or training with the control socket an axially adjoining sleeve to a bearing comprehensive pipe section that can be dismantled.
  • this design also offers the Preferred that when connecting the control bush and sleeve a rotational adjustment of the control bush relative to the sleeve and so that the sleeve-side extension is made possible in turn together with the other extension in Interaction with the C-spring, the middle rotational position or Starting position of the rotary slide valve specifies.
  • the invention has 1 a control socket 1, which is coaxial comprises a rotary slide valve 2, control bushing 1 and Rotary slide 2 are rotatable relative to each other.
  • the Rotary vane 2 is provided with an axial bore and sets 1 to the right in a shaft part 3.
  • the Control socket 1 is rotatably coupled to a shaft part 4. This has one on the left end of the shaft part 4 open axial toothing, which extends into the from Control bush 1 overlapped area of shaft part 4 continues and near the toothless right forehead of the Shaft part 4 runs out.
  • the control socket 1 has on her left end area one in the aforementioned axial toothing of Shaft part 4 matching internal teeth.
  • connection is designed such that within the connection area of the control socket 1 and the sleeve 5 an axially and preferably also radially resilient bearing 6 on the outside or on the outside outer bearing shell is axially firmly embraced.
  • the inside or the inner bearing shell of the bearing 6 are axially fixed on Rotary slide valve 2 or on the shaft part 3.
  • the C-spring 13 preferably has a pretension, which also effective with aligned pins 11 and 12 is. This allows a relative rotation between control bushing 1 and rotary valve 2 only occur when between them both parts have a torque that is greater than that is called bias.
  • FIG. 3 differs from that previously described with reference to FIGS. 1 and 2 Construction essentially in that instead of the pins 11th and 12 axial extensions 11 'and 12' are arranged, which on the axis of the control bushing 1 essentially radial flanks with groove-shaped recesses on both sides semicircular profile and equal radial distances from have the axis of the control bushing 1. In these recesses engages the C-spring 13 with oppositely profiled ends, so that the result is the same function as in the Embodiment of FIGS. 1 and 2 results.
  • FIG. 4 shows the characteristic of the C-spring 13, ie the restoring moment M caused by the spring 13 is shown as a function of the angle of rotation ⁇ between the control bushing 1 and the control slide 2. Due to the preload of the C-spring 13, an initial torque + M 0 or - M 0 must be overcome when leaving the central position of control bushing 1 and rotary slide valve 2, the sign indicating the relative direction of rotation. As the torsion angles increase, the restoring torque increases continuously.
  • the shaft parts 3 and 4 are arranged as part of a mechanical through drive between steered vehicle wheels and a steering handwheel or another steering handle of a vehicle, no rotation adjustment will occur between control bushing 1 and rotary slide valve 2 relative to the central position, as long as only between the steering handwheel or steering handle and steered vehicle wheels low steering torques are transmitted. Only when the amount of steering torque exceeds the amount of M o , the control bushing 1 and the rotary valve 2 are more or less rotated relative to each other, with the result that now the servo valve formed by the control bushing 1 and the rotary valve 2 is a servo motor of the vehicle steering for generating a more or less large servo force that supports the respective steering maneuver. At steering torques that remain less than the amount of M 0 , the servo motor does not generate any servo force. This ensures that the driver gets a good feeling for the respective road condition on the steering handwheel or on the steering handle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Claims (6)

  1. Soupape d'asservissement, en particulier pour des servo-directions hydrauliques de véhicules automobiles, réalisée sous la forme d'une soupape à registre rotatif, munie d'un registre rotatif (2) et d'un manchon de commande (1) entourant celui-ci coaxialement, susceptible de tourner par rapport au registre rotatif, à l'encontre de la force d'un ressort (13),
    caractérisée en ce que,
    la douille de commande (1) est reliée à une douille (5) coaxiale et, axialement, entre le manchon de commande (1) et la douille (5), est disposé ou réalisé un palier, qui fixe au moins axialement l'un par rapport à l'autre le manchon de commande (1) et le registre rotatif (2).
  2. Soupape d'asservissement selon la revendication 1,
    caractérisée en ce que le manchon de commande (1) est relié, à l'aide d'un accouplement à ajustement de forme, de façon assujettie en rotation à une partie d'arbre (4), qui est maintenue axialement, d'une part, par mise en butée d'une de ses extrémités frontales sur l'extrémité frontale tourné vers elle du registre rotatif (2) et, d'autre part, par une butée axiale, sur l'accouplement 'à liaison par ajustement de forme.
  3. Soupape d'asservissement selon la revendication 2,
    caractérisée en ce que partie d'arbre (4) comporte une denture extérieure axiale, qui évolue, à l'extrémité, située côté registre rotatif, de la partie d'arbre (4) en formant une butée, qui coopère avec une denture intérieure correspondante du manchon de commande (1) ou de la douille (5).
  4. Soupape d'asservissement selon l'une des revendications 1 à 3, caractérisé en ce qu'
    un premier prolongement axial (11, 11') est disposé excentriquement par rapport à l'axe de la soupape à registre rotatif, à une extrémité frontale de la douille (5).
    à distance axiale de l'extrémité libre de ce prolongement (11, 11') est disposée, sur une partie (10), assujettie en rotation au registre rotatif (2), une face frontale, tournée vers l'extrémité frontale précitée, avec un autre prolongement (12, 12') du même genre que le premier prolongement (11, 11') présentant, par rapport à l'axe de la soupape à registre rotatif, le même espacement radial que le même espacement radial que le premier prolongement (11, 11').
    la longueur globale axiale des prolongements (11, 11' ; 12, 12') est un peu inférieure à l'espacement axial entre l'extrémité frontale citée de la douille (5) et la face frontale citée de la partie (10), assujettie en rotation au registre rotatif (2), et
    entre l'extrémité frontale citée de la douille (5) et la face frontale citée de la partie (10), assujettie en rotation au registre rotatif (2), est disposé un ressort en C (13), entourant par parties le registre rotatif (2) ou une partie d'arbre (3) prolongeant axialement le registre rotatif (2), ressort dont les extrémités libres sont serrées contre les prolongements (11, 11',12, 12') et tentent de faire passer ceux-ci en une position mutuellement alignée.
  5. Soupape d'asservissement selon la revendication 4,
    caractérisée en ce que le ressort en C (13) est précontraint et reste encore contraint, même lorsque les prolongements (11, 11',12, 12') sont alignés l'un, l'autre.
  6. Soupape d'asservissement selon l'une des revendications 1 à 5, caractérisée en ce que le palier (6) fixe le manchon de commande (1) et le registre rotatif (2), axialement et radialement l'un par rapport à l'autre.
EP98941402A 1997-07-31 1998-07-22 Servo-soupape Expired - Lifetime EP0999972B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19733031A DE19733031C2 (de) 1997-07-31 1997-07-31 Servoventil
DE19733031 1997-07-31
PCT/EP1998/004599 WO1999006263A1 (fr) 1997-07-31 1998-07-22 Servo-soupape

Publications (2)

Publication Number Publication Date
EP0999972A1 EP0999972A1 (fr) 2000-05-17
EP0999972B1 true EP0999972B1 (fr) 2001-06-20

Family

ID=7837511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98941402A Expired - Lifetime EP0999972B1 (fr) 1997-07-31 1998-07-22 Servo-soupape

Country Status (7)

Country Link
US (1) US6250333B1 (fr)
EP (1) EP0999972B1 (fr)
JP (1) JP3404595B2 (fr)
KR (1) KR100323884B1 (fr)
DE (2) DE19733031C2 (fr)
ES (1) ES2159961T3 (fr)
WO (1) WO1999006263A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11098805B1 (en) * 2020-05-13 2021-08-24 The Boeing Company Shuttle valve with detent mechanism

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150063A1 (de) * 1980-12-19 1982-08-12 Jidosha Kiki Co Servolenkung
FR2511466B1 (fr) * 1981-08-11 1986-01-17 Dba Distributeur rotatif hydraulique pour servomecanisme
JPS58156458A (ja) * 1982-03-15 1983-09-17 Jidosha Kiki Co Ltd 動力舵取装置
FR2549167B1 (fr) * 1983-07-13 1988-01-29 Applic Mach Motrices Distributeur hydraulique destine a equiper une commande d'aeronef
JP2525400B2 (ja) * 1987-03-26 1996-08-21 豊田工機株式会社 動力舵取装置用サ−ボ弁装置
JP2532612B2 (ja) * 1988-10-17 1996-09-11 東海ティーアールダブリュー株式会社 回転式方向制御弁
US5058696A (en) * 1990-11-05 1991-10-22 General Motors Corporation Variable effort automotive power steering gear and method
DE4234571A1 (de) * 1992-10-14 1994-04-21 Zahnradfabrik Friedrichshafen Zentriereinrichtung, insbesondere für Lenkventile
DE4404535C2 (de) * 1994-02-12 2000-07-27 Trw Fahrwerksyst Gmbh & Co Lenkventil
DE19615543C2 (de) * 1996-04-19 1998-09-17 Daimler Benz Ag Servoventil
DE19615554A1 (de) * 1996-04-19 1997-10-23 Abb Patent Gmbh Verfahren und Einrichtung zur Steuerung einer Verdunkelungsanlage

Also Published As

Publication number Publication date
JP3404595B2 (ja) 2003-05-12
KR20010013330A (fr) 2001-02-26
DE19733031C2 (de) 2000-10-26
JP2001512076A (ja) 2001-08-21
DE19733031A1 (de) 1999-06-02
ES2159961T3 (es) 2001-10-16
US6250333B1 (en) 2001-06-26
WO1999006263A9 (fr) 1999-06-03
EP0999972A1 (fr) 2000-05-17
DE59800896D1 (de) 2001-07-26
WO1999006263A1 (fr) 1999-02-11
KR100323884B1 (ko) 2002-02-08

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